Loose leaf binder



Feb. 7, 1933. J. C. DAWSQN 1,896,840

LOOSE LEAF BINDER Filed April 29, v1931 fa/nes C. azwswb.

Patented Feb. 7, 17933 UNITED s'lxrss PATENT o1-FICE JAMES o. DAWsoN, oFWEBSTER GRovEs, MISSOURI, Ass'IGNoR ro ELMA N. DAWSON, on .I

WEBSTER GRovEs, `lvrIssoUnr y LOOSE LEAF BINDER Application med April29,

adapted to loose leaf binders of the wire arch frame type. Y I

Other objects and advantages will appear from the specification and theappended drawing in which- I Fig. 1 illustrates in perspective the looseleaf binder;

Fig. 2 is a bottom plan view of a wire arch frame loose leaf binderfitted with booster levers of a type which are herein proposed;

Fig. 3 is a vertical section through one end of the loose leaf binder onthe line 3-3 of Fig. 2; y

Fig. 4 is a vertical transverse section through the loose leaf binder onthe line 4-4 of Fig. 3; V

Fig. 5 is a bottom plan view illustrating the alternative form ofbooster llever as applied to binders of the wire arch frame type; Y

Fig. 6 is a vertical lngitudinal section through one end of a bindershowing a further modified form of booster lever;

Fig. 7 is a transversevertical section on the line 7-7 of Fig. 6; n

Fig. 8 is a vertical longitudinal section through the end of a looseleaf binder illustrating a still further modification of the boosterlever; and

Fig. 9 is a transverse vertical section on the line 9-9 of Fig. 8.

The b inder, generally indicated by 10, comprises a fabric orcardboardcover 11, to which is attached by any means the metal binding element12. The cover 13 is a channel section having a crowned or arched web 14,and two vertical marginal iianges 15 and 16. Articulated wire archframes 17 and 18 are retained within the cover and their ends,

which project therethrough, terminate in the mating pairs ofpaper-holding prongs 19 and 21. A third pair of paper-holding prongs 22and 23 may be affixed to the frames 17 and 18, if desired.

As best indicated in Fig. 2, a pin or rivet 24 is set through theflanges 15 and 16 adj acent the ends of the binder to support and,

1931. Serial'No. 533,716.

form alfulcrum for the booster lever 25 which Y.bea-rs the lugs 26,26adapted toreceive; the

pin. The inner end 27 ofthe booster lever, is

`arranged topress against the arch frames 17 and 18 andto'lift them,while ythe outer end 28 terminates in the thumb piece 29V which extendsbeyond thecover. l The booster lever is prevented from mov- ,ingsidewise o-nthe pin by the end vwall'31 ,of

the cover, which' is cut away at 32 only enough to give the necessary.clearance. f

`An alternative form of lever may be as shown in Fig. 5. In this formthe booster lever is `provided with integral Vtrunnions 33, 33 vwhich-ineffect form af pinpivoted in the holes 34C,k 34 punched through flangesIn Fig. 6,7the booster lever 35 mayA be `formed iwith the transverse rib36 which. fits over the rivet or pin 240. After the rivet is put in'place7 it is impossible to displace soy .zo y

the booster lever, since-its `upper surface 37 engages the webr1ll0 asshown in Fig. 7.

Lugs may be provided on the booster lever as shown in Fig.l 8. Thesecomprise two integral projections 38'which fit over and engage thetransverse pin41. To prevent the booster lever from being displacedafter the pin has been put in position, its central l ortion may bebumped up as shown at 39. hisz engages the weband prevents the leverfrom coming loose.

Another common loose leaf binder has inturned instead of verticalmargins or anges It can well be appreciated that the angular positionrof the flanges with respect to the web is of negligible importance andthat the form of booster lever and booster lever support hereinillustrated is equally applicable to binders of the nturned flange type.y

What I claim, therefore, is: v

1. AIn a loose leaf binder, a cover plate having marginal flanges, apair of articulated toggle elements retained therein bearing matingpairs of paper-holding prongs extending v through the plate, a pinforming a fulcrum` extending between the flanges and a booster leverpivotally mounted by the pin and adapted to lift the toggle elements.

form of wire arch frame l lturned-marginal portions, a pair of articu-2. In a loose leaf binder, a cover plate having a web and marginalflanges, articulated toggle elements bearing mating pairs ofpaper-holding prongs maintained within the cover, land a booster leverhaving integral trunnions engaging the flanges extending beneath the webVand adapted to lift the toggle i elements. f

3. In a loose leaf binder, a cover plate having aweb and'marginalflanges, articulated toggle elements maintained therein bearing matingpairs of paper-holding prongs, a pin extending between the flangesforming a fulcrum for a booster leverYV and a booster lever bearingllugsto engage the pin adapted to engage the toggle elements vand to.lift them and retainedagainst displacement by the engagementofitslfupper ysurfacewith the web.

4; In a loose leaf-binder, an arched cover plate withthe crown uphavingdownwardly lated elements bearing mating pairs of paperholdingprongs, a booster lever extending ber neath and pivoted upon themarginal portions of the cover plate and adapted to engage thearticulated elementsl and to lift them.

' 5. In a loose leafbinder, a cover plate having down-turned marginalportions, a pair of articulated toggle elements therein, and a pivotedbooster lever supported upon the down-turned marginal portions of thecover plate and adapted to engage Vthe toggle ele- -ments and to liftthem.

Iny testimony whereof I aflix my signature. p

V,JAMES f C. DAWSON.'

